Quick Answer
Nosler Partition bullets are generally reliable in expanding at cold temperatures, but expansion may be compromised if temperatures drop below 0°F (-18°C) or if the bullet is subjected to extreme velocity loss.
Temperature and Expansion
Nosler Partition bullets are designed to maintain their integrity and expand reliably in a wide range of temperatures. The key to reliable expansion is the bullet’s ability to maintain its velocity and impact the target with sufficient force. In general, Nosler Partition bullets will expand reliably up to -20°F (-29°C), but expansion may be compromised if temperatures drop below this point.
Velocity and Expansion
Expansion is also influenced by the bullet’s velocity at impact. At lower velocities, the bullet may not have enough kinetic energy to expand reliably. As a general rule, Nosler recommends a minimum velocity of 2,000 fps (610 m/s) to ensure reliable expansion of their Partition bullets. This velocity threshold ensures that the bullet has enough energy to overcome the cold temperatures and expand consistently.
Cold-Weather Tactics
When hunting in cold temperatures, it’s essential to use a rifle with a muzzle velocity of at least 2,200 fps (671 m/s) to ensure reliable expansion. Additionally, using a rifled barrel with a longer length can help to maintain velocity and ensure a more consistent shot. By taking these precautions, hunters can increase their chances of consistent expansion from Nosler Partition bullets, even in cold temperatures.
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